Seat plug



FIG. 1 is a top perspective view thereof;

FIG. 2 is a bottom back perspective view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a bottom left perspective view thereof;

FIG. 7 is a right view thereof; and,

FIG. 8 is a top view thereof. 

CLAIM The ornamental design for a seat plug, as shown and described. 